I found this offering from MS today when I was looking for a boot-time scanner:
Microsoft Standalone System Sweeper Beta
It’s basically like MS’s Security Essentials which I’ve posted about before but it will run stand alone, i.e. without starting Windows first. This is important because by the time Windows is running any malware on there might be already running and/or undetectable.
Basically you download the file then burn it to a blank USB drive, CD or DVD and then start the PC from it. Ultimately you’ll get to a Windows Defender Offline window where you can scan your computer:
Admittedly as of writing it’s only in Beta but I’m pleased to see that with this and Security Essentials MS seems to finally be taking malware seriously.